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-EN
MX (Media Xpander) makes vocals or instruments sound distinct
regardless of the music source. The FM radio, CD, USB memory and
iPod, will be able to reproduce the music clearly even in cars with a lot
of road noise.
Changing the source to which you want to apply Media
Xpander.
FM (MX level 1 to 3):
The medium to high frequencies become clearer, and produces
well balanced sound at all frequencies.
CD (MX level 1 to 3):
CD mode processes a large amount of data during playback.
MX takes advantage of this large data quantity to reproduce a
more clear, clean output.
CMPM (MX level 1 to 3):
This corrects information that was lost at the time of
compression. This reproduces a well-balanced sound close to
the original.
DVD (MX level 1 to 3):
A DVD or Video CD contains a large quantity of data such as
music clip. MX uses this data to reproduce the sound
accurately.
AUX (MX level 1):
Choose the MX mode (CMPM, MOVIE, or MUSIC) that
corresponds to the media connected.
•
The initial setting of MX is different depending on the source.
•
Each music source, such as FM radio, CD, and MP3/WMA/AAC can
have its own MX setting.
•
On disks with both MP3/WMA/AAC and CD-DA, when the source
changes from “MP3/WMA/AAC to CD-DA” or “CD-DA to
MP3/WMA/AAC”, MX-mode switching may delay playback slightly.
•
Setting to Non Effect sets MX mode of each music source to OFF.
•
The function is inoperable when DEFEAT is set to ON.
•
There is no MX mode for MW and LW radio.
•
If an audio processor with the MX function (PXA-H701, etc.) is
connected, its own MX processing is applied to the music source.
Since the processor MX settings may not match the head unit, the
audio processor needs to be adjusted. For details, refer to the
Owner’s Manual of the audio processor.
•
“CMPM” is applied for MP3/WMA/AAC and iPod.
About Time Correction
The distance between the listener and the speakers in a car vary widely
due to the complex speaker placement. This difference in the distances
from the speakers to the listener creates a shift in the sounds image and
frequency characteristics. This is caused by the time delay between the
sound reaching the listener’s right versus the left ear.
To correct this, this unit is able to delay the audio signal to the speakers
closest to the listener. This effectively creates a perception of increased
distance for those speakers. The listener can be placed at an equal
distance between the left and right speakers for optimum staging.
The adjustment will be made for each speaker in 3.4cm steps.
Adjust the time correction level of the front left speaker to a high value
and the rear right to zero or a low value.
The sound is not balanced because the distance between the
listening position and the various speakers is different.
The difference in distance between the front left speaker and the rear
right speaker is 1.75 m (68-7/8").
Here we calculate the time correction value for the front left speaker
in the diagram on the above.
Conditions:
Farthest Speaker – listening position : 2.25 m (88-9/16")
Front left speaker – listening position : 0.5 m (19-11/16")
Calculation: L = 2.25 m – 0.5 m = 1.75 m (68-7/8")
Time correction = 1.75 ÷ 343
*
1
× 1,000 = 5.1 (ms)
*
1
Speed of sound: 343 m/s (765 mph) at 20°C
In other words, giving the front left speaker a time correction value of
5.1 ms makes it seem as if its distance from the listener is the same
as the distance to the farthest speaker.
Time correction eliminates the differences in the time required for the
sound to reach the listening position.
The time of the front left speaker is corrected by 5.1 ms so that its
sound reaches the listening position at the same time as the sound of
other speakers.
Adjust the time correction level of each speaker to almost the same level.
1
Sit in the listening position (driver’s seat, etc.) and
measure the distance (in meters) between your head
and the various speakers.
2
Calculate the difference between the distance
correction value to the farthest speaker and the
other speakers.
L = (distance to farthest speaker) – (distance to other
speakers)
Setting the MX Level
Example 1. Listening Position: Front Left Seat
Example 2. Listening Position: All Seats
5.1ms
2.25m
0.5m
Summary of Contents for iDA-X311
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